Update config.md

Co-authored-by: Davis Bennett <davis.v.bennett@gmail.com>

Author: maxrjones

docs/user-guide/config.md

@@ -30,7 +30,7 @@ Configuration options include the following:
 - Default Zarr format `default_zarr_version`
 - Default array order in memory `array.order`
 - Whether empty chunks are written to storage `array.write_empty_chunks`
-- Enable experimental rectilinear chunk grids `array.rectilinear_chunks`
+- Enable experimental rectilinear chunks `array.rectilinear_chunks`
 - Async and threading options, e.g. `async.concurrency` and `threading.max_workers`
 - Selections of implementations of codecs, codec pipelines and buffers
 - Enabling GPU support with `zarr.config.enable_gpu()`. See GPU support for more.